Alas, no - this web page is not the right place for copyright disclaimers. But I will send you directions via email to the correct web page (assuming you reside in the US) or directions for starting a snail mail exchange (if you reside elsewhere).

I think it is likely to be more useful to be able to select files on their sparseness (rather than the total blocks occupied). However, I'm inclined to ask the list members what they'd find useful. If there is a consensus option, we can go with that.